That should probably be (intermedia x Morning Glory). That is a hybrid made at H & R Nurseries, and registered in 2004, Blc. (or Bc.) Marg Putnam. The appearance is believable for that cross. How Doris figures in I have no idea. Someone could have intended to give a cultivar name 'Doris' to the plant even without knowing the name of the cross, or they got it from aunt Doris, or whatever. There are several Catt hybrids called Doris, but none that would look anything like this or that would likely be a parent of this.